<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>商品分类</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片区域 -->
		<el-card>
			<el-row>
				<el-col>
					<el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
				</el-col>
			</el-row>
			<!-- 表格 -->
			<tree-table :data="cateList" :columns="columns" 
			:selection-type="false"
			:expand-type="false"
			:show-index="true" index-text="#" border
			:show-row-hover="false"
			class="treeTable"> 
			<!-- 是否有效模板 -->
			<template v-slot:isok="scope">
				<i class="el-icon-success"
				v-if="scope.row.cat_deleted===false"
				style="color: lightgreen;"></i>
				<i class="el-icon-error" v-else
				style="color: red;"></i>
			</template>
			<!-- 排序模板 -->
			<template v-slot:order="scope">
				<el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
				<el-tag type="success" size="mini" v-else-if="scope.row.cat_level===1">二级</el-tag>
				<el-tag type="warning" size="mini" v-else-if="scope.row.cat_level===2">三级</el-tag>
			</template>
			<!-- 操作 -->
			<template v-slot:opt="scope">
				<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditCateDialog(scope.row.cat_id)">编辑</el-button>
				<el-button type="danger" icon="el-icon-delete" size="mini"  @click="removedCateById(scope.row.cat_id)">删除</el-button>
			</template>
			</tree-table>
			<!-- 分页区域 -->
			<el-pagination
			      @size-change="handleSizeChange"
			      @current-change="handleCurrentChange"
			      :current-page="querInfo.pagenum"
			      :page-sizes="[3,5,10,15]"
			      :page-size="querInfo.pagenum"
			      layout="total, sizes, prev, pager, next, jumper"
			      :total="total">
			</el-pagination>
		</el-card>
		<!-- 添加分类的对话框 -->
		<el-dialog
		  title="添加分类"
		  :visible.sync="addCateDialogVisible"
		  width="50%"
		  @close="addCateDialogClosed">
		  <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px" class="demo-ruleForm">
		    <el-form-item label="分类名称:" prop="cat_name">
		      <el-input v-model="addCateForm.cat_name"></el-input>
		    </el-form-item>
			<el-form-item label="父级分类:" style="lable-width='80px'">
			  <el-cascader
			      v-model="selectedKeys"
			      :options="parentCateList"
			      :props="{ expandTrigger: 'hover',value:'cat_id',label:'cat_name',children:'children',checkStrictly:true}"
			      @change="parentCateChanged"
				  clearable 
				  >
			  </el-cascader>
			</el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addCateDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addCate">确 定</el-button>
		  </span>
		</el-dialog>
		<!-- 编辑对话框区域 -->
		<el-dialog
		  title="编辑分类"
		  :visible.sync="editCateDialog"
		  width="50%">
		  <el-form :model="editCateForm" :rules="editCateFormRules" ref="editCateFormRef" label-width="100px" class="demo-ruleForm">
		    <el-form-item label="分类名称:" prop="cat_name">
		      <el-input v-model="editCateForm.cat_name"></el-input>
		    </el-form-item>
		</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editCateDialog = false">取 消</el-button>
		    <el-button type="primary" @click="editCate">确 定</el-button>
		  </span>
		</el-dialog>
		<!-- 删除对话框区域 -->
		<el-dialog
		  title="删除分类"
		  :visible.sync="deletedCateDialogVisible"
		  width="50%">
		  <span>这是一段信息</span>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="deletedCateDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="deletedCateDialogVisible = false">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default{
		data(){
			return{
				//查询条件
				querInfo:{type:3,pagenum:1,pagesize:5},
				total:0,
				//商品分类的数据列表
				cateList:[],				
				//为table指定列的定义
				columns:[
					{label:'分类名称',prop:'cat_name'},
					{label:'是否有效',type:'template',template:'isok'},
					{label:'排序',type:'template',template:'order'},
					{label:'操作',type:'template',template:'opt'}
				],
				addCateDialogVisible:false,
				addCateForm:{
					cat_name:'',
					cat_pid:0,
					cat_level:0
				},
				addCateFormRules:{
					cat_name:[
						{required:true,message:'请输入分类名称',trigger:'blur'}
					]				
				},
				parentCateList:[],
				selectedKeys:[],
				editCateDialog:false,
				editCateForm:{
					cat_name:'',
					cat_id:0
				},
				editCateFormRules:{
					cat_name:[
						{required:true,message:'请输入分类名称',trigger:'blur'}
					]	
				},
				deletedCateDialogVisible:false
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			//商品分类的获取
			async getCateList(){
				const {data:res}=await
				this.$http.get('categories',{params:this.querInfo})
				if(res.meta.status!==200){
					return this.$message.error('获取商品分类失败')
				}
				
				this.cateList=res.data.result
				this.total=res.data.total
			},
			//监听pagesize的改变
			handleSizeChange(newSize){
				this.querInfo.pagesize=newSize
				this.getCateList()
			},
			handleCurrentChange(newPage){
				this.querInfo.pagenum=newPage
				this.getCateList()
			},
			showAddCateDialog(){
				this.getParentCateList()
				this.addCateDialogVisible=true
			},
			async getParentCateList(){
				const {data:res}=await
				this.$http.get('categories',{params:{type:2}})
				if(res.meta.status!==200){
					this.$message.error('获取父级分类数据失败！')
				}
				this.parentCateList=res.data
			},
			parentCateChanged(){
				console.log(this.selectedKeys)
				if(this.selectedKeys.length>0){
					this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1]
					this.addCateForm.cat_level=this.selectedKeys.length
					return
				}else{
					this.addCateForm.cat_pid=0
					this.addCateForm.cat_level=0
				}		
			},
			async addCate(){
				this.$refs.addCateFormRef.validate(async valid=>{
					if(!valid) return
					const {data:res}=await
					this.$http.post('categories',this.addCateForm)
					if(res.meta.status!==201){
						this.$message.error('添加分类失败！')
					}
					this.$message.success('添加分类成功！')
					this.getCateList()
					this.addCateDialogVisible=false
				})
			},
			addCateDialogClosed(){
				this.$refs.addCateFormRef.resetFields()
				this.selectedKeys=[]
				this.addCateForm.cat_pid=0
				this.addCateForm.cat_level=0
			},
			async showEditCateDialog(cat_id){
				const {data:res}=await
				this.$http.get('categories/'+cat_id)
				//console.log(res)
				if(res.meta.status!==200){
					return this.$message.error('查询分类失败！')
				}
				this.editCateForm=res.data
				this.editCateDialog=true
			},
			editCate(){
				this.$refs.editCateFormRef.validate(async valid=>{
					//console.log(valid)
					if(!valid) return
					const {data:res}=await this.$http.put('categories/'+this.editCateForm.cat_id,
					{cat_name:this.editCateForm.cat_name})
					if(res.meta.status!==200){
						return this.$message.error('修改分类失败！')
					}
					this.editCateDialog=false
					this.getCateList()
					//this.$message.success('修改分类成功')
				})			
			},
			async removedCateById(id){
				const confirmResult=await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
								          confirmButtonText: '确定',
								          cancelButtonText: '取消',
								          type: 'warning'
				}).catch(err=>err)
				if(confirmResult!=='confirm'){
					return this.$message.info('取消了删除')
				}
				const {data:res}=await
				this.$http.delete('categories/'+id)
				if(res.meta.status!==200){
					return this.$message.error('删除分类失败！')
				} 
				 //this.$message.success('删除成功')
				 this.getCateList()
			}
		}
	}
</script>

<style scoped>
	.treeTable{
		margin-top: 15px;
	}
	.el-cascader{
		width: 100%;
	}
</style>
